921202 Engine Mechanical Pre-test

What is being measured here?

• Cylinder bore.

• Thrust angle.

• Piston skirt diameter.

• Piston ring end gap.

A restricted catalytic converter will cause all of the following symptoms EXCEPT:

• Lack of power.

• Higher than normal vacuum.

• Lower than normal vacuum.

• Increased manifold pressure.

A vehicle is back for the third time with a leaking rear main seal. Which of the following is the most likely cause for this condition?

• Overfilled crankcase.

• Gouges in the crankshaft mating surfaces.

• Restricted PCV system.

• Faulty gasket material.

What dimension is being measured when an outside micrometer reading is taken at both ends of a crankshaft journal?

• Journal out of round.

• Journal taper.

• Bearing clearance.

• Crankshaft end-play.

A vehicle equipped with a manual transmission knocks loudly at idle. The noise stops when the clutch is depressed. What is the most likely cause?

• Worn rod bearings.

• Excessive piston pin clearance.

• Worn crankshaft thrust bearing.

• A broken piston ring.

Technician A states that piston ring gaps should be staggered around the pistons in 45-degree intervals to prevent excessive oil consumption and blow-by. Technician B states that piston ring gaps should be staggered around the pistons in 120-degree intervals to prevent excessive oil consumption and blow-by. Who is right?

• Technician A only.

• Technician B only.

• Both Technician A and Technician B.

• Neither Technician A nor Technician B.

Which location is the most reliable for identifying the engine code?

• Engine block.

• VIN.

• Emission label.

• Timing chain cover.

What is the purpose of valve lapping?

• To increase camshaft pre-load.

• To adjust valve installed height.

• To match valve and seat surfaces.

• All of the above.

The amount of cylinder bore taper can be determined with which of the following?

• A dial bore gauge.

• An inside micrometer.

• The difference in ring end gap from the bottom to the top of the cylinder.

• All of the above.

What is the standard for frost protection for coolant installed in Audi vehicles according to ELSA?

• Down to -48°C (-54.4°F).

• Between 15°C (59°F) and -10°C (14°F).

• -25 °C (-13 °F) and in arctic climatic countries down to approximately -36 °C (-32.8 °F).

• -18°C (0°F) and in arctic climate countries down to approximately -25°C (-13°F).